G1, G2 and S phase are the divisions of the interphase i.e. the resting phase of the cell cycle.
A cell cycle has two phases; interphase and M-phase.
During interphase the cell grows and in M-phase it divides.
G1 is the Gap between the M-phase and the S-phase.
G2 is the gap between the S phase and M phase.

DNA replication is confined to the S part of interphase.
Since G1 phase comes before the S phase , we can say that a cell that has duplicated chromosome cannot be in G1 phase.

7 0

3 years ago

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Using natural resources found in the environment, what did sumerians build strong walls with?

stiv31 [10]

Sumerians built walls using the natural resource they were surrounded with, which was namely clay. They used this clay to create fired mud-bricks, as there was not any other building stone available at the time. However, the clay mud-bricks proved to be a solid structure for town fortification.

4 0

3 years ago

Select all the correct answers.

AVprozaik [17]

Answer:

a and b

Explanation:

This may not be right, but from what i remember it should be when the moon is aligned with the sun then the tide is highest

4 0

2 years ago

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Which is a nonrenewable source of energy? A) wind B) hydropower C) natural gas D) solar energy